Here is yesterday Medium post named "Wanchain Name Service (WNS) has been deployed": https://medium.com/wanchain-foundation/wanchain-name-serivce-wns-has-been-deployed-49c4894cafd9

To save your time I am going to paste here the main point of it.

The primary goal of WNS is to resolve human-readable names, like ‘Jacklu.wan’, into machine-readable identifiers, including Wanchain addresses and other identifiers. A secondary purpose is to provide metadata about names, such as ABIs for contracts, and who is information for users.

Users may register names under two top level domains:
.wan, which uses an auction based registrar with the same functionality as the main network, and allows users to keep names indefinitely; see Registrar.sol.
.test, which allows anyone to claim an unused name for test purposes, which expires after 28 days; see TestRegistrar.sol.